Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
  • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2200/00—Details of cutting inserts
  • B23B2200/20—Top or side views of the cutting edge
  • B23B2200/201—Details of the nose radius and immediately surrounding area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2200/00—Details of cutting inserts
  • B23B2200/20—Top or side views of the cutting edge
  • B23B2200/208—Top or side views of the cutting edge with wiper, i.e. an auxiliary cutting edge to improve surface finish
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/12—Boron nitride
  • B23B2226/125—Boron nitride cubic [CBN]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/31—Diamond
  • B23B2226/315—Diamond polycrystalline [PCD]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2200/00—Details of milling cutting inserts
  • B23C2200/20—Top or side views of the cutting edge
  • B23C2200/201—Details of the nose radius and immediately surrounding areas
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2200/00—Details of milling cutting inserts
  • B23C2200/20—Top or side views of the cutting edge
  • B23C2200/208—Wiper, i.e. an auxiliary cutting edge to improve surface finish
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2200/00—Details of milling cutting inserts
  • B23C2200/24—Cross section of the cutting edge
  • B23C2200/243—Cross section of the cutting edge bevelled or chamfered
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges

Definitions

• the present disclosure relates to an insert with a wiper and a method of manufacturing the insert. More particularly, the present disclosure relates to an insert with a wiper to induce chip thinning on the leading edge of the insert without a significant decrease in insert access and a method of manufacturing the insert.
• cutting inserts may be adapted to be part of the cutting tool.
• a larger radius reduces the accessibility or "reach" of the insert.
• An exemplary cutting insert includes a body formed with at least one corner, and the corner is formed with at least a first radius and a second radius disposed adjacent the first radius.
• An exemplary method of manufacturing a cutting insert includes providing a body, and forming a corner on the body with a first radius and a second radius disposed adjacent the first radius.
• FIG. 1 is a perspective view of an insert in accordance with an exemplary embodiment
• FIG. 2 is a plan view of the insert shown in FIG. 1 ;
• FIG. 3 is a partial plan view in detail of a portion of the insert shown in
• FIG. 1 is a diagrammatic representation of FIG. 1 ;
• FIG. 4 is a partial plan view in detail of another portion of the insert shown in FIG. 1 ;
• FIG. 5 is a side elevational view of the insert shown in FIG. 1 ;
• FIG. 6 is a partial side elevational view in detail of a portion of the insert shown in FIG. 5;
• FIG. 7 is a perspective view of an insert with a wiper in accordance with another exemplary embodiment
• FIG. 8 is a perspective view of an insert with a corner radius
• FIG. 9 is a graph of uncut chip thickness and angular position for the inserts shown in FIGS. 7 and 8;
• FIG. 1 0 is a perspective view of an insert with a wiper in accordance with yet another exemplary embodiment
• FIG. 1 1 is a perspective view of an insert with a corner radius
• FIG. 1 2 is a graph of uncut chip thickness and angular position for the inserts shown in FIGS. 10 and 1 1 ;
• FIG. 1 3 is a graph of life for cutting inserts with a corner radius only and for cutting inserts with a corner radius and a leading edge.
• At least three kinematic variables may be cutting speed, depth-of-cut, and feed-rate.
• the depth-of-cut and feed rate resolved to the shape of the surfaces bounding the cutting edge, may produce an uncut chip area, which may include and be characterized by a maximum uncut chip thickness.
• the maximum uncut chip thickness can be the maximum incident work material area per unit width in a cross-section perpendicular to the cutting edge at a certain point inside the portion of the cutting edge engaged in contact with the workpiece producing the chip. Reducing the maximum uncut chip thickness without sacrificing productivity and flexibility can be an important goal in insert design.
• Productivity, for constant cutting speed may be closely tracked by the uncut chip area, whereas flexibility is a result of number of considerations, one of which is insert reach, which is elaborated in the following.
• a cutting insert 100 can be adapted to reduce an uncut chip thickness.
• the cutting insert 100 may have many different shapes; however, for the sake of simplifying the description thereof, an exemplary embodiment is described in reference to the cutting insert 100 shown in the figures.
• the cutting insert 1 00 shown in the figures may be referred to as a square cutting insert. However, the invention is not meant to be limited to only the cutting insert 100 shown and described.
• the cutting insert 100 can include a body 1 02.
• the body may include a plurality of faces 104, 1 06, 108, 1 10, 1 12, and 1 14. In the
• the body 1 02 may include six faces 1 04, 106, 1 08, 1 10, 1 12, and 1 14.
• the body 102 may include have a different number of faces than the six faces 1 04, 106, 1 08, 1 1 0, 1 12, and 1 14 shown.
• the body 1 02 may include less than six faces or more than six faces. The exact number of faces 1 04, 106, 1 08, 1 10, 1 12, and 1 14 may be determined by the application, use, or some other criterion related to the cutting insert 100.
• two opposite faces may have a generally square shape as shown; however, the body 102 may be alternatively constructed to include one or more generally square, generally rectangular, generally rhomboid, or some other suitable polygonal shape, for example.
• the exact shape of each face 1 04, 106, 1 08, 1 10, 1 12, and 1 14 may be determined by the application, use, or some other criterion related to the cutting insert 1 00.
• one of the plurality of faces 104, 1 06, 108, 1 10, 1 1 2, and 1 14 may be designated as the top face, and thus, an opposite face of the plurality of faces 104, 1 06, 108, 1 10, 1 1 2, and 1 14 may be designated as a bottom face.
• the faces joining the top face and the bottom face may be referred to as flank faces or side faces.
• face 1 04 may be the top face
• face 106 which may be opposite face of 104 may be the bottom face.
• Faces 108, 1 10, 1 12, and 1 14 which may extend from the top face 1 04 to the bottom face 106 may be the flank faces.
• faces 104, 1 06, 108, 1 1 0, 1 12, and 1 14, there may be a different arrangement of faces 104, 1 06, 108, 1 1 0, 1 12, and 1 14, such that face 1 04 need not be the top face, face 1 06 need not be the bottom face, and faces 108, 1 10, 1 12, and 1 14 need not be the flank faces.
• the body 102 may include one or more corners 120, 160, 1 80, and 190.
• a corner 1 20, 160, 1 80, and 190 may be formed where a plurality of the faces 104, 1 06, 108, 1 10, 1 12, and 1 14 of the body 1 02 meet.
• the body 102 may include four corners 120, 160, 180, and 1 90; however, the number of corners 120, 160, 180, and 190 is not meant to be limiting. In alternative constructions of the cutting insert 100, there may be less than or more than the four corners 1 20, 160, 1 80, and 190 shown.
• the corner 120 may be formed from faces 104, 1 12, 1 14, and 106; the corner 1 60 may be formed from faces 104, 1 1 2, 1 10, and 1 06; the corner 180 can be formed from faces 1 04, 1 10, 108, and 106; and the corner 190 can be formed from faces 1 04, 108, 1 14, and 106.
• the corners 1 20, 1 60, 180, and 1 90 may each be formed from a different combination of faces of the plurality of faces.
• Each of the corners 120, 1 60, 180, and 190 may have a portion designated as a leading edge and another portion designated as a trailing edge. That is, one of the plurality of faces 1 04, 106, 1 08, 1 1 0, 1 12, and 1 14 may be designated as a leading edge, and another of the plurality of faces 1 04, 106, 1 08, 1 10, 1 12, and 1 14 may be designated as a trailing edge.
• the cutting insert 100 shown in FIG. 1 is to be a right-handed cutter, then the direction of cutting for the cutting insert 100 may be towards the left side of the FIG. 1 .
• face 1 14 may be designated as the leading edge
• face 1 1 2 may be designated as the trailing edge.
• the cutting insert 1 00 shown in FIG. 1 is to be a left-handed cutter, then the direction of cutting for the cutting insert 100 may be towards the right side of the FIG. 1 .
• face 1 1 0 may be designated as the leading edge
• face 1 1 2 may be designated as the trailing edge.
• Each of the other corners 160, 180, and 190 may have a portion designated as the leading edge and another portion designated as the trailing edge.
• the body 1 02 may have a width and height that are about 9.52 millimeters or about 0.375 inches, for example.
• the body 102 can have different dimensions for the width and height, and the width and height do not need to be equal.
• the corner 120 may include a first arc 122, a second arc 1 24 being disposed adjacent to the first arc 122, and a third arc 126 being disposed adjacent to the second arc 1 24.
• the first arc 1 22 may be a circular arc defined by a first radius 128; the second arc 1 24 may be a circular arc defined by a second radius 130; and the third arc 126 may be a circular arc defined by a third radius 1 32.
• one or more of the arcs 1 22, 124, or 1 26 may not be a circular arc.
• the second radius 130 may sometimes be referred to as the corner radius. Reach may be defined as the distance between a center of the insert 1 00 to a center of any one corner radius, such as second radius 1 30.
• the second radius 1 30 may distribute a cutting load of the insert 100 over a larger portion of the insert 1 00.
• a larger second radius 1 30 may also provide a smoother finish to an object being cut by the insert 1 00.
• a larger second radius 130 may reduce a reach of the insert 1 00 or an accessibility of the insert 100.
• the second arc 124 with the second radius 130 may determine the reach of the insert 1 00.
• the second radius 1 30 becomes larger, for a certain sized insert, a center of the second radius 130 moves towards the center of the insert, and thus, the center of the corner radius moves towards the center of the insert.
• the reach becomes smaller because, for a particular sized insert, the center of second radius 1 30 moves toward the center of the insert.
• first and third arcs 122 and 126 may sometimes be referred to as a wiper. Furthermore, if the insert 100 is a right-handed cutter, then the first arc 122 may be further referred to as a leading edge wiper, and the third arc 126 may be further referred to as a trailing edge wiper. If the insert 100 is a left- handed cutter, then the third arc 126 may be the leading edge wiper, and the first arc 1 22 may be the trailing edge wiper.
• a wiper on the leading edge may have a different purpose than a wiper on the trailing edge.
• the wiper on the leading edge may adjust an uncut chip thickness of the object being cut by the insert 100. In combination with selected orientation angles of an insert holder, the maximum uncut chip thickness occurs on the leading edge. Thus, a wiper on the leading edge may then be provided for chip thinning effect or to produce a lower maximum uncut chip thickness. Also, the wiper on the leading edge may adjust the life of the insert 100. For example, in the embodiment shown, the wiper on the leading edge may increase the life of the insert 100.
• a wiper on the trailing edge has a different purpose and function than the wiper on the leading edge.
• the wiper on the trailing edge may provide surface finishing treatment.
• the wiper on the trailing edge may improve surface finish on a part.
• the embodiment shown may include a wiper on the trailing edge but the wiper on the trailing edge need not specifically improve surface finish.
• an insert, such as insert 1 00 may include both wipers on the leading edge and the trailing edge to provide the same purpose or function or different purposes or functions.
• wipers on both the leading edge and the trailing edge may provide improved surface finish, better reach, both better reach and improved surface finish, or some other advantage.
• the first, second, and third arcs 122, 1 24, and 1 26 may form a compound curve, wherein the first, second, and third arcs 122, 124, and 1 26 may be
• first arc 122 may transition smoothly into the second arc 124
• second arc 124 may transition smoothly into the third arc 1 26.
• the first arc 1 22 may have a first tangent 134 at an end of the first arc 122
• the second arc 124 may have a second tangent 136 at an end of the second arc 124 disposed where the first arc 1 22 meets the second arc 1 24.
• the first tangent 1 34 and the second tangent 1 36 may be the same so that the first arc 122 and the second arc 124 may meet smoothly with no discontinuity.
• the second arc 1 24 may have another tangent 138 at another end of the second arc 124, and the third arc 126 may have a third tangent 140 at an end of the third arc 126 disposed where the third arc 126 meets the second arc 1 24.
• the other tangent 138 and the third tangent 140 may be the same so that the second arc 1 24 and the third arc 126 may meet smoothly with no discontinuity.
• the one or more additional arcs may each be a circular arc, and each of the one or more additional arcs that are circular arcs may have a blending radius.
• the first, second, and third arcs 1 22, 124, and 1 26 may not form a compound curve, or the first, second, and third arcs 122, 124, and 126 may not be consecutive tangent circular arcs.
• the second radius 130 can be selected from one of a plurality of standard radii, such as the standard radii described in ISO 6897:1998(E), entitled "Indexable hard material inserts with rounded corners, with partly cylindrical fixing hole - Dimensions.”
• the second radius 130 can be about 0.4 millimeters, 0.8 millimeters, 1 .6 millimeters, 3.2 millimeters, for example.
• the second radius 1 30 is not limited to standard radii, and in alternative constructions, the second radius 1 30 may be a non-standard radius.
• the second radius 130 may be determined by the application, use, or some other suitable criterion of the insert 1 00.
• the corner 120 may have a first arc 1 22 of about 25 degrees, for example, and a third arc 1 26 of about 25 degrees, for example. Also, the first arc 122 may have a first radius 128 of about 3.00
• the third arc 126 may have a third radius 1 32 of about 3.00 millimeters or about 0.1 18 inches, for example,.
• the second arc 124 may have a radius of 0.80 millimeters or about 0.032 inches, for example,.
• the first and third arcs 122 and 126 and the first and third radii 128 and 132 are not limited to the ones described above.
• the first and third arcs 122 and 126 and the first and third radii 1 28 and 132 may be determined from the
• the first and third arcs 122 and 1 26 and the first and third radii 128 and 132 may be determined from the shape of the insert 1 00, the second arc 124, the second radius 1 30, or the shape of another adjacent feature.
• one or more of the other corners 1 60, 180, and 190 may also each include a first arc with a first radius, a second arc with a second radius, and a third arc with a third radius. That is, one or more of the other corners 160, 1 80, and 190 may each have a predetermined corner radius with either a leading edge wiper, a trailing edge wiper, both a leading edge wiper and a trailing edge wiper, or no leading edge wiper and trailing edge wiper.
• the other corners 160, 1 80, and 190 may have the same corner radius as corner 120 or some other corner radius.
• the leading edge wiper and/or the trailing edge wiper may have an arc or radius that is different from the first and third arcs 122 and 1 26 or the first and third radii 128 and 132.
• corner 160 may include a fourth arc 1 62, a fifth arc 1 64 being disposed adjacent to the fourth arc 162, and a sixth arc 166 being disposed adjacent to the fifth arc 164.
• the fourth arc 1 62 may be a circular arc defined by a fourth radius 168;
• the fifth arc 164 may be a circular arc defined by a fifth radius 170;
• the sixth arc 166 may be a circular arc defined by a sixth radius 1 72.
• one or more of the arcs 1 64, 166, and 168 may not be a circular arc.
• the fourth, fifth, and sixth arcs 1 62, 164, and 166 may form a compound curve, wherein the fourth, fifth, and sixth arcs 162, 164, and 166 may be consecutive tangent circular arcs. That is, the fourth arc 162 may transition smoothly into the fifth arc 164, and the fifth arc 164 may transition smoothly into the sixth arc 166.
• Each of the fourth, fifth, and sixth arcs 162, 164, and 166 may include tangents that are substantially the same as an adjacent tangent of another arc 162, 1 64, or 166.
• the fourth, fifth, and sixth arcs 162, 1 64, and 1 66 may not form a compound curve, or the fourth, fifth, and sixth arcs 162, 1 64, and 166 may not be consecutive tangent circular arcs.
• At least corner 1 20 may include a chamfer 1 16.
• the chamfer 1 16 may be provided along a perimeter of face 1 04.
• the chamfer 1 1 6 may be provided only along a portion of the perimeter of face 1 04 or may be provided along at least a portion of the perimeters of one or more of the other faces 106, 108, 1 10, 1 1 2, and 1 14.
• the chamfer 1 16 may include a chamber width 1 18 and a chamfer angle 1 1 9.
• the chamfer 1 16 has a chamfer width 1 18 of about 0.1 0 millimeters or about 0.004 inches, for example, and a chamfer angle 1 19 of about 25 degrees, for example, relative to face 104.
• a chamfer width 1 18 and chamfer angle 1 1 9 are not limited to the chamfer width 1 18 and chamfer angle 1 1 9 described above.
• the exact chamfer width 1 1 8 and chamfer angle 1 19 may be determined by the application, use, or some other criterion of the insert 100.
• first and third arcs 122 and 126 and the first and third radii 128 and 132 may be determined from the chamfer width 1 1 8 or the chamfer angle 1 18 along with the shape of the insert 1 00, the second arc 1 24, the second radius 130, or some other feature of the insert 1 00.
• FIGS. 7-9 a cutting insert with a wiper on the leading edge is compared with a cutting insert with only a corner radius.
• the analysis shown in FIGS. 7-9 was completed with three dimensional modeling.
• the three dimensional modeling is described in "Surface Finish and Tool Wear Characterization in Hard Turning using Cutting Tool Representation in Mathematica" by Raja Kountanya.
• a polar coordinate system may be fixed to a center of the corner radius, and every point on the cutting edge may be referenced by the angle between a line joining the origin to the point and a fixed line in the plane on a top face of the insert. This may be referred to as the angular value or angular position.
• the bounds of the angular position designating the cessation of contact of the insert and a workpiece may be referred to as angular extremities of contact.
• the model may estimate the angular extremities of contact for given feed and depth-of-cut in conjunction with geometry parameters.
• the model may also allow estimation of uncut chip thickness at every point of the cutting edge engaged in contact with the workpiece.
• FIG. 7 shows a cutting insert with a wiper.
• FIG. 8 shows a cutting insert with only a corner radius and no wiper.
• the chamfer width is about 0.20 millimeters, for example; the chamfer angle is about 25 degrees, for example; an edge radius is about 0.005 millimeters, for example; a lead angle is about 45 degrees, for example; an inclination angle is about -5 degrees, for example; a normal rake angle is about -5 degrees, for example; a depth of cut is about 0.25 millimeters, for example; and the feed rate is about 0.075 millimeters per revolution, for example.
• the wiper radius is about 3 millimeters, for example, and the wiper arc is about 25 degrees, for example.
• FIG. 9 a graph of uncut chip thickness versus an angular position is shown.
• the angular position is a position along a cutting edge of a cutting insert.
• Uncut chip thickness is shown in millimeters, and angular position is provided in degrees.
• Uncut chip thickness versus angular position was calculated for the same feed rate, depth of cut, and insert holder.
• the dotted line in FIG. 9 may represent the uncut chip thickness versus angular position along the cutting edge of the cutting insert with only a corner radius and without a wiper.
• the dotted line may indicate a maximum uncut chip thickness of about 0.052412 millimeters, for example, at an angular position of about 1 78 degrees, for example.
• the solid line in FIG. 9 represents the uncut chip thickness versus angular position along the cutting edge of the cutting insert with a wiper.
• the dotted line indicates a maximum uncut chip thickness of about 0.03631 32 millimeters, for example, at an angular position of about 1 62 degrees, for example.
• the cutter with a wiper on the leading edge shows an approximately 30% reduction, for example, in maximum uncut chip thickness with only an approximately 5% reduction, for example, in reach.
• FIGS. 10-1 2 a cutting insert with a wiper on the leading edge may be compared with a cutting insert with only a corner radius.
• the analysis shown in FIGS. 1 0-12 may be completed with the same three dimensional modeling as for FIGS. 7-9.
• FIG. 10 shows a cutting insert with a wiper.
• FIG. 1 1 shows a cutting insert with only a corner radius and no wiper.
• FIGS. 10-1 shows a cutting insert with only a corner radius and no wiper.
• the chamfer width may be about 0.10 millimeters, for example; the chamfer angle is about 25 degrees, for example; an edge radius is about 0.005 millimeters, for example; a lead angle is about 45 degrees, for example; an inclination angle is about -5 degrees, for example; a normal rake angle is about -5 degrees, for example; a depth of cut is about 0.25 millimeters, for example; and the feed rate is about 0.075 millimeters per revolution, for example.
• the wiper radius is about 3 millimeters, for example, and the wiper arc is about 25 degrees, for example,.
• FIG. 1 2 a graph of uncut chip thickness versus an angular position is shown.
• the angular position may be a position along a cutting edge of a cutting insert.
• Uncut chip thickness is shown in millimeters, and angular position is provided in degrees.
• Uncut chip thickness versus angular position was calculated for the same feed rate, depth of cut, and tool holder.
• the dotted line in FIG. 1 2 represents the uncut chip thickness versus angular position along the cutting edge of the cutting insert with only a corner radius and without a wiper.
• the dotted line indicates a maximum uncut chip thickness of about 0.052412 millimeters at an angular position of about 178 degrees.
• the solid line in FIG. 1 2 represents the uncut chip thickness versus angular position along the cutting edge of the cutting insert with a wiper.
• the dotted line indicates a maximum uncut chip thickness of about 0.03631 32 millimeters, for example, at an angular position of about 162 degrees, for example.
• the cutter with a wiper on the leading edge shows an approximately 30% reduction, for example, in maximum uncut chip thickness with only an approximately 5% reduction in reach, for example,.
• the reduction in accessibility is 5.20512%, for example, and the reduction in maximum uncut chip thickness is 30.7159%, for example.
• FIG. 1 3 shows life in minutes for two sets of cutting inserts.
• One of the two sets may include results for a cutting insert with only a corner radius, and the other of the two sets may include results for a cutting insert with a corner radius and a leading edge wiper.
• the first set of data in the left side of the graph may be for cutting inserts with only a corner radius and no wiper.
• the second set to the right of the first set may be for cutting inserts with a corner radius and a leading edge wiper.
• cutting inserts with two different chamfer widths are tested.
• two cutting inserts may have the same corner radius; however, one has a chamfer width of 0.1 millimeters, for example, (bar shaded with broken horizontal lines), and the other has a chamfer width of 0.2 millimeters, for example, (the bar shaded with solid diagonal lines).
• two cutting inserts may have the same corner radius and leading edge wiper; however, one may have a chamfer width of 0.1 millimeters, for example, (the bar shaded with broken horizontal lines), and the other has a chamfer width of 0.2 millimeters, for example, (the bar shaded with solid diagonal lines).
• the chamfer width is about 0.10 millimeters, for example,; the chamfer angle is about 25 degrees, for example; an edge radius is about 0.005 millimeters, for example; a lead angle is about 45 degrees, for example; an inclination angle is about -5 degrees, for example; a normal rake angle is about -5 degrees, for example,; a depth of cut is about 0.25 millimeters; and the feed rate is about 0.075 millimeters per revolution, for example.
• the wiper radius is about 3 millimeters, for example, and the wiper arc is about 25 degrees, for example.
• the work material of the cutting inserts was Wallex-3 or WX3, manufactured by Wall Colmonoy.
• the insert 1 00 can be made from polycrystalline cubic boron nitride (PCBN), polycrystalline diamond (PCD), or some other suitable material.
• PCBN polycrystalline cubic boron nitride
• PCD polycrystalline diamond
• the exact material chosen for the insert 1 00 depends on the application, use, or some other criterion for the insert 100.
• the insert 1 00 may be made with a computer numerical control (CNC) tool grinder or some other suitable device that may shape hard materials. If the insert 100 is made by using a CNC tool grinder, a predetermined amount of a suitable material may be inserted into the CNC tool grinder.
• a grinding wheel of the CNC tool grinder may be used to form at least corner 1 20 with predetermined first, second, and third arcs 122, 124, and 1 26, each with a respective predetermined first, second, and third radius 128, 1 30, and 132. That is, the CNC tool grinder may provide a predetermined corner radius without wipers or with a leading edge wiper, a trailing edge wiper, or both a leading edge and a trailing edge wiper.
• the CNC tool grinder may blend the first, second, and third arcs 1 22, 124, and 1 26 so that no sharp features appear between adjacent arcs 122, 124, and 126.
• the CNC tool grinder may also provide a chamfer 1 1 6 with a predetermined chamfer width 1 18 and chamfer angle 1 19.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Milling Processes (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)

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Citations (4)

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• 2012
  • 2012-05-02 WO PCT/US2012/036058 patent/WO2012151240A1/en active Application Filing
  • 2012-05-02 EP EP12722578.7A patent/EP2704864A1/de not_active Withdrawn
  • 2012-05-02 US US13/462,411 patent/US20120282048A1/en not_active Abandoned
  • 2012-05-02 CN CN201280021810.4A patent/CN103534051A/zh active Pending
  • 2012-05-02 KR KR1020137032014A patent/KR20140038975A/ko not_active Application Discontinuation
  • 2012-05-02 JP JP2014509375A patent/JP2014512978A/ja active Pending
• 2013
  • 2013-10-29 ZA ZA2013/08020A patent/ZA201308020B/en unknown
  • 2013-11-03 IL IL229207A patent/IL229207A0/en unknown

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